Hydraulic Diagrams; Steering Control Unit Description - Nilfisk-Advance SW8000 Service Manual

Service Manual – SW8000

Hydraulic Diagrams

Steering Control Unit Description

The
Steering Control Unit
the steering wheel to turn the drive wheel in
the appropriate direction to steer the machine.
When the Operator turns the steering wheel,
the steering wheel shaft rotates the
and , which are connected by
Valve Rotary Meter
a mechanical link inside of the
.
Unit
• The direction in which the
moves determines which side of the
receives the hydraulic oil
Steering Cylinder
to turn the drive wheel left or right. Note
that when the Operator stops turning the
steering wheel, the springs in the
return the
Control Unit
neutral (closed) position to hold the
rod in its current position.
Cylinder
• The number of degrees that the
rotates determines the volume of oil
Meter
that the
Steering Cylinder
. This allows the drive wheel
Rotary Valve
to turn in proportion to the steering wheel
rotation.
uses the input from
Rotary
Steering Control
Rotary Valve
Steering
to the
Rotary Valve
Steering
Rotary
receives from the
Steering Cylinder Stationary
L
Steering
Control
Unit
A
Oil to Cooler, Filter
and Reservoir
Oil from "A" Port on
Hydraulic Manifold
Assembly
Steering System
R
1100
PSI
T
174
Rotary Rotary
Valve Valve
Rotary Rotary
Meter Meter